lhs2tex doesn't compile in 8.4.2 and 8.4.3

[GeorgeCo]

$ cabal install lhs2tex
...
[ 2 of 21] Compiling Document ( src/Document.lhs, dist/build/lhs2TeX/lhs2TeX-tmp/Document.o )

src/Document.lhs:32:42: error:
Ambiguous occurrence ‘<>’
It could refer to either ‘Prelude.<>’,
imported from ‘Prelude’ at src/Document.lhs:7:10-17
(and originally defined in ‘GHC.Base’)
or ‘Document.<>’, defined at src/Document.lhs:27:9
|
32 | > catenate = foldr (<>) Empty
| ^^^^

[kosmikus]

Sorry for not making a new release in such a long time. 1.21 should work with ghc-8.4.

[GeorgeCo]

Great, thanks!